Stove-top burner and air shield



May 2, 1950 F. s. BECHTOLD STOVE-TOP BURNER AND AIR SHIELD Filed June 5,1944 2 Sheets-Sheet 1 3 ibrrasififie oizioli 3 W Wa g M y 2,1950 F. s.BECHTOLD STOVE-TOP BURNER AND AIR SHIELD 2 Sheets-Sheet 2 Filed June 5,1944 M5 W w M J z m7 Z 6 xi 4 a Iv m z I L 7 Z [W h 0 Z 4 0 M z PatentedMay 2, i950 UNITED STATES PATENT I OFF ICE :STOV E -.TQP BURNER AW!) AIR'SHIEL'D LFOrreSt .S. .Bechtold, Long Beach, Calif.

Application -June 5, 1944, Serial No. 5381742 .2 Claims.

1 This invention relates generally to improvements'sin'ggaseousz-fuelburners and pertains particularly to an improved :burner for domesticcooking stoves orzranges.

Flu-gas cookingstoves-of thecharacter atpresentemployed'there isdisposed beneath an open vided .tor the burner units and thearea raroundthe units :iszopen and "consequently dust, dirt and :food :materials'which -may escape from thecookring utens'ilscan collect in the lowerpart of the :stovestructure beneath the burners with the ;re-

sult that considerable difiiculty is experienced.

:inPkeeping the-:structureclean.

A principal objectof the present invention is to z-prov'id'e a .fuelburner .or :.a fburner top structure for ,gas cooking ranges, whereinall of the parts which are :at present separate and independent, areincorporatedf'in a single top unit thereby providing a burner top which,is solid or un'broken except in the central part .of the small iareaoccupied by the burner fingers.

Another object of the invention is .to provide anvimproved gasburnerunit with novel :means for supplying auxiliary air Lfor admixture withthe'burning gases atthe flame ports.

Still another object of the invention to ,pro- -vide an improved gasburner structure :in which individual burner :units are enclosed in acommon housing, with means tor -the=controlledzadmission of air intosaid housing and discharge :of the same adjacent to the =flame or gasdis- :charge ports Ofath burners Still :another object .of .theinvention is to :provide aggas'ran'ge iburnerrunit or top structurecomprising a relatively shallow housing having openings corresponding toiaz-numbier of burner units to be enclosed in thehousing, with each ofsaid openings having therein finger shells [designed to enclose or housethe burner fingers'of a unit, such shells 'be'ing spaced from the burnerunit fingers to permit the passage-of air to dischargeiplilltsfliofiatfid above the .gas zdischarge iports of -the'fingers ofthe burner units.

".The invention will be best aimdcrstoodziirom' a consideration .of theiollowing :detailed :description taken in connection with 'theaccompany- Zing drawing forming a pantzof the specification, with theunderstanding, however, that the invention is not confined .to a strictconformity with the showing or the drawing but may be changed ormodified so-ilong as such changes or modifications mark no material'departurefirom.

2 the salient features of the invention as expressed :in appendedclaims.

In the drawing Figure 1 1's .a view in-plan-of a two burnergaseousstove, unit, constructed in accordance with the {present invention,portions being broken away.

Figure 2 is a view in side elevation of an end ol atop of a stoveshowing the unit in position.

Figure :3 is-a sectional view taken on the line 5-3 of Figure 1.

Figure 4 "is a "horizontal section taken on the line ld of Figure 3.

Figure 5 is :a horizontal section through "the front end wall of thehousing and the adjacent ends of the gasconduits, showing the aircontrolled valves.

diigure :6 is a sectional view on an enlarged scale taken on the:line":66 of Figure .3.

Referring now more particularly to the drawnumeral I!) generallysdesignates a conventional :gas range 1 structure, the working topportion 10f which is "designated H.

In ranges of the type at present manufactured, when the burners sareuncovered for use :such burners are supported in a "well or chamfberwhich is covered merely .by an open grate :upon which the cookingutensils are placed.

IIn accordance "with :the present invention the :major portion of theworking top of the range is closed and the only penings "leading throughthe top to the under side are at the centers of the burner units.

A two-burner unit, constructed in accordance with the present invention,is shown in detail "in Figure 3 and is generally designated U andmomprises a relatively fiat housing consisting of ;a top wall l2 havingthe side or edge walls 1-3 and the front and 'backwalls :M and I5respectively. The .lower' part' -iof the housing or shell iS :closed "bythe :bottom wall or :plate I 6 which :be 'reinovably "secured .to theedges of the walls !.3, its and 15 'or :may be welded thereto after thestructure has dceen assembled, :as may be desired.

"The housing top wall i2 .is "provided with the two-burner openings Hinto which extend :as integral 312311135 of the wall 1-2 the burnerfinger 'sh'el'ls 1:3. Theseshel'ls are alternately long and short sothatin .a construction having six burner dimers and sixfinger-shells, threeof the shells will be long and extend :near to the center of the opening"while the other three ;she'lls which are in alternate relation with thelong shells, will be shorter as shown.

Themater'ial of the wall l2 is-pressed or shaped :at the peripheryofea'ch opening l -l and in the portions m'aking'up the finger shells48, to :prowide theopening defining wall I9 and the shell defining wall20. ih e edges of these walls 1:9

I and extend down to and have contact with the bottom plate I6.

The material of the longer finger shells is pressed upwardly to form thelongitudinally extending utensil rests 2| and one side wall 29 of eachfinger shell, and the end of such wall near the center of the opening,is provided with a longitudinally extending series of openings 22, theopenings being in corresponding sides of the series of finger shells sothat the series of openings 2 of one shell is directed toward anunapertured or blank wall 20 of an adjacent shell.

Within the housing are disposed the two burners, each of which isgenerally designated 23. Each of these burners comprises the usualhollow ring 24 from the inner side of which extends the burner fingers25 which correspond in number with the shells l8. Connected with eachring 24 "is the conduit or tube 26 which extends to the wall l of thehousing Where it is secured so that its open end covers the airadmission openings 21 formed in the wall I4, as well as the fuel gasinjector opening 28.

Interposed between the secured end of the conduit 26 and the front wall[4 of the housing is a shiftable air admission control plate or valveplate 29 which has apertures 30 which may be moved into registry withthe apertures 21 for the "full admission of air into the conduit 26 ormay be shifted to a position where a portion of the plate 29 closes theapertures 21 or partially closes the same as may be desired.

In the construction here shown the air control valve plate 29 isslidably held in position by the securing elements 3! which are employedfor securing the end of the conduit to the front wall [4 but obviouslyany other suitable means may be employed for regulating the air supplythrough the conduit for admixture with the injected fuel gas to form acombustible mixture.

The plate 29 is also provided with an opening 32 which is designed tocoact with the opening 28 so that the nozzle 33 leading from the gasvalve 34-, may be directed into the adjacent end of the conduit 26. Thevalve 34 is of the standard type commonly used in gas stoves and issecured to and receives the fuel gas from the supply pipe 01' manifold35.

Each of the burner fingers 25 is provided along one side and round thetip with the fuel gas discharge ports 36, which ports equal in numberthe openings 22. These ports 36 may be formed in short nozzle-likeextensions 31 each of which fit into the lower part of an opening 22. Bymaking each of the gas discharge ports 36 of a height less than theheight of the opening 22'through which it discharges, it will be seenthat there is provided above each gas discharge port, an air dischargeport 38. The shells 18 are slightly larger or greater than the fingerswhich they enclose and consequently there is provided between each shelland finger, an air passageway 39 leading from the interior of thehousing.

The front edge wall M is provided between the gas valves with airadmission openings 40 whereby air may freely enter the housing and 'fiowthrough each burner finger shell for discharge through the air dischargeports 38.

While in the description and illustration of the invention reference hasbeen made to a housing or casing enclosing two-burner units it is to beunderstood that the invention is not to be limited to this number ofunits in a housing as it will be readily obvious that the housing mayenclose one unit only or it may enclose more than two.

file of this patent:

Also it will be readily apparent that while the air admission openinghas been illustrated and defined as being in the front edge wall M ofthe housing, such opening may be placed in any other wall as may befound desirable.

From the foregoing it will be readily apparent that a stove topconstructed in accordance with the present invention may be more easilykept clean than those stove tops wherein the burner units are disposedbeneath open gratings and also that with the unit structure heredescribed supplemental air will be supplied to the gas jets foradmixture with the gas as it issues from the discharge ports, whereby toimprove the combustion.

I claim:

1. In a burner-for gas stoves comprising a hollow fiat housing designedto form. a part of the top of the stove structure and having top, bottomand surrounding side walls, means for admitting air to said housing, anaperture through the top wall of said housing, a hollow gas ringsurrounding said aperture and enclosed by said housing, the ring beingspaced from the housing top and side walls, means for admitting gas tosaid gas ring,'hollow fingers projecting from said gas ring radiallyinwardly of the aperture, each hollow finger having gas exit ports inone side wall extending to the aperture, hollow finger shieldsprojecting from said housing radially inwardly of the aperture andcompletely encasing the hollow fingers but spaced vertically therefromto form an air passageway, and air exit ports in said hollow fingershields adjacent to said gas exit ports.

2. In a burner unit for a gas stove comprising a hollow fiat housingdesigned to form a part of the top of the stove structure and havingtop, bottom and surrounding side walls, means for admitting air to saidhousing, an aperture through the top wall of said housing, a hollow gasring surrounding said aperture and enclosed by said housing, the ringbeing spaced from the housing top and side walls, means for admittinggas to the gas ring, hollow fingers projecting from said gas ringradially inwardly of the aperture, gas exit ports in one side wall ofeach of said hollow fingers extending to the aperture, hollow fingershields projecting from said housing radially inwardly of the apertureeach completely encasing a hollow finger but spaced vertically therefromto form an air passageway, air exit ports in the side walls of saidhollow finger shields, said air exit ports in the finger shields beingvertically aligned with and closely adjacent to the gas exit ports inthe hollow fingers.

FORREST S. BECHTOLD.

REFERENCES CITED The followingreferences are of record in the UNITEDSTATES PATENTS Number Name Date.

895,998 Fling Aug. 11, 1908 1,452,440 Robinson Apr. 17, 1923 1,488,677Hofi'man Apr. 1, 1924 1,720,909 Lang July 16, 1929 1,735,618 ODowd Nov.12, 1929 2,320,754 Sherman June 1, 1943 2,344,144 Hobson Mar. 14, 1944FOREIGN PATENTS Number I Country Date Y 12,832 Great Britain r.. of 1912

